<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        
    </style>
</head>
<body>
    
</body>
<script>
    
    // var arr = [{
    //     name:"admin",
    //     age:18,
    //     sex:"男",
    //     hobby:["篮球","足球"]
    // },{
    //     name:"root",
    //     age:20,
    //     sex:"女",
    //     hobby:["唱歌","跳舞"]
    // }]

    // console.log(arr);
    // console.log(arr[0]);
    // console.log(arr[0].hobby);
    // console.log(arr[0].hobby[1]);



    // var arr = [[1,["a","b"]],[3,4],[[[true,false],"d"],6],[7,8]];

    // console.log(arr);
    // console.log(arr[2]);
    // console.log(arr[2][0]);
    // console.log(arr[2][0][0]);
    // console.log(arr[2][0][0][1]);

</script>
</html>